its seems interrupt is not working ... plz find ,where  i gone wrong  ... 
OUTPUT : I NEED TO DISPLAY 1 , WHEN EXTERNAL INTERRUPT OCCURS ... EXTERNAL INTERRUPT IS THE JOYSTICK (UP DIRECTION)...
/************************* (C) COPYRIGHT 2007 RAISONANCE **********************
* File Name          :  Application.c
* Author             :
* Date First Issued  :
* Description        :  Circle_App CircleOS application template.
* Revision           :
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "circle_api.h"
/* Private defines -----------------------------------------------------------*/
#define NEEDEDVERSION "V 1.5" // Put here the minimal CircleOS version needed by your application
/* Private variables ---------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
enum MENU_code MsgVersion(void);
void init(void);
void change (void);
/* Public variables ----------------------------------------------------------*/
const char Application_Name[8+1] = {"My App"};  // max 8 characters for application name
/*******************************************************************************
* Function Name  : Application_Ini
* Description    : Initialization function of Circle_App. This function will
*                  be called only once by CircleOS.
* Input          : None
* Return         : MENU_CONTINUE_COMMAND
*******************************************************************************/
enum MENU_code Application_Ini ( void )
   {
   if(strcmp(UTIL_GetVersion(), NEEDEDVERSION) < 0)
      {
      return MsgVersion();
      }
      
void init(void)
{
RB0:1;
INT0:1;
GIEH:1 ;
PEIE:1;
RBIP:1;
INTEDG1:1;
}
      
      // TODO: Write your application initialization function here.
      
      
   return MENU_CONTINUE_COMMAND;
   }
/*******************************************************************************
* Function Name  : Application_Handler
* Description    : Management of the Circle_App.
*
* Input          : None
* Return         : MENU_CONTINUE
*******************************************************************************/
enum MENU_code Application_Handler ( void )
   {
   // TODO: Write your application handling here.
   //       This routine will get called repeatedly by CircleOS, until we
   //       return MENU_LEAVE
 
   DRAW_DisplayString(5,60,"1",17);
   
   #pragma code HIGH_INTERRUPT_VECTOR=0X8
/*void high_ISR (void)
{
goto change
}
#pragma code*/
IDLEN:1;
   return MENU_CONTINUE;   // Returning MENU_LEAVE will quit to CircleOS
   }
/*******************************************************************************
* Function Name  : MsgVersion
* Description    : Display the current CircleOS version and the version needed
*                  exit to main menu after 4 secondes
*
* Input          : None
* Return         : MENU_CONTINUE
*******************************************************************************/
enum MENU_code MsgVersion(void)
   {
   int hh,mm,ss,ss2;
   
   DRAW_DisplayString(5,60,"CircleOS",17);
   DRAW_DisplayString(80,60,UTIL_GetVersion(),3);
   DRAW_DisplayString(5,34,NEEDEDVERSION,3);
   DRAW_DisplayString(40,34," required",12);
   
   RTC_GetTime(&hh,&mm,&ss);
   ss = ss + 4;                  // 4 secondes 
   ss = ss%60;
   
   do
      {
      RTC_GetTime(&hh,&mm,&ss2);
      }while (ss2 != ss);           // do while < 4 secondes
   
   return MENU_REFRESH;
   }
 
#pragma interrupt change 
void change(void)
{
DRAW_DisplayString(5,60,"2",17);
INT0IF:0;
}
   
THANKS FOR YOUR HELP